German lender Deutsche Bank expects ongoing litigation concerning its acquisition of postal service retail bank Postbank to affect second-quarter and full-year profitability. The Higher Regional Court of Cologne on Friday assessed claims from former Postbank shareholders contending that a higher offer price should have been paid in connection with Deutsche Bank’s voluntary takeover offer in October 2010. The total value of the claims, inclusive of accumulated interest, is estimated at around €1.3 billion ($1.4 billion). The court’s indications during the hearing suggest potential validity in s…